If you're starting to bump up against the storage limit on your computer, it might be time to think about grabbing another hard drive to help you store all your important files. Seagate's Expansion Desktop 4TB External Hard Drive is a fantastic pick that's now more affordable than ever. On sale at Amazon for just $69.99, this deal saves you $20 off its average cost. Within the last year, it's sold for as much as $100 on a consistent basis.

Seagate's Expansion 4TB hard drive is compatible with both Windows and Mac computers but would first need to be reformatted for use on Mac. If you're a Windows user though, you'll be able to get started with saving files and folders directly to the hard drive right out of the box without having to install anything. This hard drive does require to be plugged in via a power adapter and also a USB cable and features SuperSpeed USB 3.0 for quick file transfers. Existing owners give it 4 out of 5 stars based on over 4,000 Amazon reviews.

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